【摘要】 为抑制电力系统的电压波动和闪变,提出了一种基于可控电抗器的静止无功补偿器(SVC)拓扑结构。它可以做成任何电压等级直接接入高压电网,能够根据系统无功功率变化动态地调节可控电抗器的饱和度,平滑地改变其发出的无功功率;采用H∞控制作为主要控制策略,有效地抑制了电压波动和闪变。理论分析和仿真结果表明,基于可控电抗器的SVC具有很大的容量调节范围,能够响应快速的负荷变化,并且不受系统电流大幅度变化的电磁干扰影响,在抑制系统电压波动和闪变方面起到了很好的作用。更多还原

【Abstract】 In order to suppress the voltage fluctuation and flicker in the power system,this paper puts forward a topology of SVC based on the controllable reactor,by which voltages at any level can be connected to the ultra-high or extra-high voltage network directly,and the saturation degree of the controllable reactor can be dynamically adjusted according to the fluctuation of the reactive power of the system.Meanwhile,H∞ control is taken as the main control strategy,through which the voltage fluctuation and flicker is suppressed effectively.Theoretical analysis and simulation indicate that the SVC based on the controllable reactor works well in suppressing the voltage fluctuation and flicker because of its large capacity adjustment scope,the fast responding to the load variation,and immune to the electromagnetic interference that caused by the large amplitude variation of the system current.更多还原